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Journal of Engineering
Volume 2013, Article ID 309124, 6 pages
Research Article

Voltage Mode Pulse Width Modulator Using Single Operational Transresistance Amplifier

1Department of Electronics and Communication, Delhi Technological University, Bawana Road, Delhi 110042, India
2Department of Electronics Engineering, Indian School of Mines, Dhanbad, Jharkhand 826004, India

Received 31 August 2012; Revised 2 December 2012; Accepted 10 December 2012

Academic Editor: Kyoung Kwan Ahn

Copyright © 2013 Rajeshwari Pandey et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents a voltage mode pulse width modulator (PWM) using single operational transresistance amplifier (OTRA). The proposed PWM consists of a relaxation oscillator output which is modulated using modulating signal. PSPICE simulation results and experimental results have been included to verify the theoretical analysis.